Question

Read the following statements and identify the incorrect statement.

• A. Volume of one mole of a gas at critical temperature is called molar volume.
• B. Pressure of a gas at critical temperature is called critical pressure.
• C. The critical temperature, pressure and volume are called critical constants.
• D. Critical temperature is the highest temperature at which a gas can exist as liquid, above this temperature it is a gas.

Answer 1

The correct option is A Volume of one mole of a gas at critical temperature is called molar volume.

Volume of the mole of gas liquefied at critical temperature $\left(T_c\right)$ is known as critical volume $\left(V_c\right)$. Volume of one mole gas at a given temperature and pressure is known as molar volume $\left(V_m\right)$.
Hence, the statement in Option A is incorrect.